Study of exchange bias behavior in Ni(Cr1-xFex)2O4

被引：14

作者：

Barman, Junmoni ^{[1
]}

Ravi, S. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, Gauhati 781039, India

来源：

SOLID STATE COMMUNICATIONS | 2015年 / 201卷

关键词：

Spinel; Ferrimagnetic; Antiferromagnetic; Exchange bias field; NICR2O4; MAGNETIZATION;

D O I：

10.1016/j.ssc.2014.10.011

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Single phase samples of Ni(Cr1-xFex)(2)O-4 were prepared by sol-gel method for x=0.0 to 0.1. Structural study at room temperature using X-ray diffraction shows that upon Fe substitution the crystal structure transforms from tetragonal cell with space group I4(1)/amd to cubic cell with Fd (3) over barm space group. The ferrimagnetic transition temperature (T-C) is found to increase from 73 K for x=0 to 187 K for x=0.1. Presence of large coercivity along with exchange bias phenomenon is observed as per M-H loop measurements. The origin of exchange bias is explained by considering the exchange anisotropy between the ferrimagnetic and the antiferromagnetic components. The temperature dependent behaviors of exchange bias field and the effective coercive field are found to be quite different, while the former one decreases exponentially but the latter one decreases in quadratic form with increase in temperature and both of them approach zero at T-C. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：59 / 63

页数：5

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